B. can be found in textbooks
Rome was the first to have a government style called a Republic that is not quite Democracy but was very similar and gave the basis for many of the government styles we have today such as the United States government. Most modern countries are democratic republics such as the United States. There was an era in Roman time that is the first example of the Republic style of government we know as normal today.
The Mississippi River is the only big waterway on the
Confederate side. Control of this river by the Union meant fast travel of
troops and supplies and ease of bombardment of many important cities by the river.
Vicksburg was a fortress city that controlled the last Confederate controlled
section of the river. Grant’s campaign and success against Vicksburg cut off
Arkansas and Texas from Richmond, gave the Union a waterway for commerce, and
replenishment of troops and supplies.